ZOMG! LunaMac! It's high time that the fandom should consider this pairing as a serious contender for FlutterMac, TwiMac, or CheeriMac. I think if written/portrayed properly, LunaMac could have some really badass storylines.
Who doesn't like LunaMac? Individually, both Macintosh and Luna have massive fanbases. It's just a darned shame that not a lot of people are aware of them as a possible couple. And just to throw in some weird coinky-dink, both their VAs voice an official MLP couple- Rarity and Sweetie Belle's parents.
They really are an appealing couple. There's some "opposites attract" vibe somewhere there, and probably so much more. As for storylines, there's the "rags to riches" approach, the "unlikely hero" approach, the "other side of the tracks" approach- the possibilities are endless! Heck, I've even drawn my own share of LunaMac!
As for other Macintosh ships, I'm also a passenger on the SS MacinPie. Best evidence is a scene in SE2, EP18- "A Friend Indeed" where Macintosh is pulling a cart with a singing Pinkie Pie.